You can start by cutting down outside food & aerated drink / fruit juice completely from your diet.
Start your meals with salads
Reduce your portion size of each meal.
Next Steps
Strictly avoid deep fried food. Opt for roasted, grilled, boiled, sauteed & poached food items.
Health Tips
Diet plans are tailor made i.e every person is unique & the plan has to be such that it suits your body type, preferences, lifestyle and food sensitivities (if any). Since your fat loss target is quite a bit, I would suggest you to book an appointment since it will help me plan a diet that helps you loss fat in a healthy way.